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Finding the Fourth Proportional to 84,581.80, 126,872.70 and 25,426.60

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Solution

The fourth proportional to 84,581.80, 126,872.70 and 25,426.60 is: 38,139.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,581.80 : 126,872.70 = 25,426.60 : x
  2. Step 2: Convert to fraction form
    84,581.80/126,872.70 = 25,426.60/x
  3. Step 3: Cross multiply
    84,581.80x = 126,872.70 × 25,426.60
  4. Step 4: Simplify right side
    84,581.80x = 3,225,941,393.82
  5. Step 5: Solve for x
    x = 3,225,941,393.82/84,581.80
  6. Step 6: Final answer
    x = 38,139.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.